Answers and Solutions

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The term sublimation refers to a physical change of state and is not used to describe transformation of a solid to a gas in a chemical reaction. For example, the dissociation on heating of solid ammonium chloride into hydrogen chloride and ammonia is not sublimation but a chemical reaction. Similarly the combustion of candles, containing paraffin wax, to carbon dioxide and water vapor is not sublimation but a chemical reaction with oxygen.

Sublimation requires additional energy and is an endothermic change. The enthalpy of sublimation (also called heat of sublimation) can be calculated by adding the enthalpy of fusionand the enthalpy of vaporization.

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Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

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The process of conversion of solid to gas directly by absorbing heat without going through the liquid state is Sublimation . 

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Sublimation is a process when a solid directly changes its state from solid to gas without going through the liquid state. Example camphor or dry ice.

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Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point. Example: Dry ice is solid carbon dioxide.

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Sublimation is the transition from the solid phase to the gasphase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point.

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It is the process of conversion of solid to liquid directly by absorbing heat or gas to solid directly by releasing heat.

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Sublimation is a change of state in which a substance upon heating transforms from solid directly to vapour/gaseous state without undergoing the liquid state.

Few sublimable substances - iodine, naphthalene, camphor, anthracene, ammonium chloride etc.